Valve seat grinder



Dec. 26,, 1950 J. 5. KLEIN, JR 2,535,292

VALVE SEAT GRINDER Filed June 17. 1947 RTTOR/VE'Y.

Patented Dec. 26, 1950 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to valve seat grinders the purpose being toprovide a new and unique arrangement of parts whereby through rotationof one element an oscillatory movement is imparted to a grindingelement.

These and other features and objects of the invention are hereinaftermore fully described and claimed and the preferred form of the inventionis shown in the accompanying drawing in which- Fig. 1 is an elevationshowing my improved grinder.

Fig. 2 is a section taken on line 22 of Fig. 1.

Fig. 3 is an elevation showing the operative parts in perspective.

Fig. 4 is a section taken on line 4-4 of Fig. 1.

The device as hereinafter described is particularly adaptable for use inthe grinding of valve seats of a tapered form and it consists of a framemember I having parallel sides 2 and 3 apertured to receive a shaft 4.This shaft has an end portion 5 to receive a handle element for rotationthereof. The shaft is provided with a threaded end 6 on which is a nut Ihaving a circular flange la rotatable in the frame portion 3 and a locknut lb is provided to secure the nut 1 in place.

The shaft 4 extends through and in fixed relation with a central member,hereinafter termed oscillator, indicated generally at 8 and, as will beunderstood from Fig. 1, the shaft 4 extends through the oscillator 8 atan angle less than a right angle to the plane occupied by theoscillator. The shaft to be oscillated is indicated at 9 as beingsupported in the bottom of the frame I and the oscillator 8 ispositioned Within the cvlindrical member II and the ring encloses thecylindrical member I I.

It will be observed from Figs. 1 and 2 that the shaft 4 extends throughthe oscillator 8 at an angle to the axis of rotation of the shaft 9 andby rotation causes the shaft 9 to oscillate in successive oppositedirections. This oscillation of the ring causes the shaft 9 to beoscillated thereby oscillating the tool l2 on the shaft 9 as indicatedby arrows in Fig. 2. The tool I2 is shown in full lines as being of acone like form particularly adapted for grinding valve seats of similarform. It is to be understood that an abrasive is utilized between theoscillatable member 12 and the valve seat being operated on.

It is to be noted that a raceway for the balls I3 is provided betweenthe oscillatable central member 8 and the outer ring In as shown in Fig.4. The ring ID has diametrically opposed pins [4 and a yoke l hasoppositely disposed eyed portions to receive the pins 14 and is attachedto the shaft 9. Therefore, by rotation of the shaft 4, the oscillatormember 8 is rotated thereby causing oscillation of the shaft 9 and thegrinding element [2.

In the use of the device it is desirable to turn the frame element Ioccasionally to make certain that all parts of the element being groundare submitted to the abrading action in view of the fact that the shaft9 may not make a complete half turn to each revolution of the shaft 4.This may be accomplished by grasping the upper end of the frame element3 in one hand and r0- tating the shaft 4 by a crank, not here shown, onthe threaded end 6 of the shaft and, by occasionally turning the frameelement on the axis of the shaft 9, the abrading tool I2 is turned onits axis to insure a uniformly smooth surface of the valve seat.

From the foregoing description it is believed evident that the deviceembodying my invention is comparatively simple and inexpensive inconstruction whereby the rotation of a shaft causes oscillation ofanother shaft.

Having thus briefly described my invention, its utility and mode ofoperation, what I claim and desire to secure by Letters Patent of theUnited States is:

A device for the purpose described, comprising a frame having parallelside members and a base, a shaft having its ends supported in therespective side members of the frame, a second shaft at a right angle tothe first shaft rotatably supported in the base of the frame, meansbetween the shafts whereby rotation of the first shaft causes anoscillation of the second shaft, said means comprising an element havinga grooved cylindrical periphery, a ring like element having an innergrooved periphery positioned in parallel spaced relation with theperiphery of the grooved element, the grooves providing a circularraceway, balls in the said raceway, a yoke at a right angle to the firstshaft having eyed end portions, a pin on each of the diametricallyopposite sides of the yoke positioned in the respective eyed endsthereof, and a grinding element at the end of the second shaft.

JOSEPH S. KLEIN, JR.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number

